Siemens SIRIUS 3RW5 Equipment Manual page 26

Description
3.3 Functions of the 3RW5 Modbus communication module
3.3.3 Assignment of data to Modbus addresses
All data of the 3RW5 soft starter are available in datasets or in the process image.
To be addressable via Modbus, the data in these datasets or in this process image are
converted to Modbus data formats.
Data access to
Read-only bits
Readable and writable bits
Read-only data sets and words (16-bit)
Read/write data sets and words
1 Coil / Discrete Input corresponds to 1 bit.
1 Register corresponds to 1 word (2 bytes).
You can find more information about access to the memory areas in chapter Function Codes
(Page 98).
26
Data type according to Modbus nomenclature
Discrete Inputs
Coils
Input Registers
Holding Registers
SIRIUS 3RW5 Modbus communication module
Equipment Manual, 03/2020, A5E43676481002A/RS-AC/003